diff --git a/tests/unit/test_duplication.py b/tests/unit/test_duplication.py
index a24c7e5b0..86672ef57 100755
--- a/tests/unit/test_duplication.py
+++ b/tests/unit/test_duplication.py
@@ -112,32 +112,44 @@ class TestDuplicateSegmentCreate:
     def test_create_similarity_boundary_values(self):
         # 0 和 100 都是合法的
         seg0 = DuplicateSegment.create(
-            source_start=0.0, source_end=1.0,
-            matched_video_id="v1", matched_video_name="v",
-            matched_start=0.0, matched_end=1.0,
+            source_start=0.0,
+            source_end=1.0,
+            matched_video_id="v1",
+            matched_video_name="v",
+            matched_start=0.0,
+            matched_end=1.0,
             similarity=0.0,
         )
         assert seg0.similarity == 0.0
 
         seg100 = DuplicateSegment.create(
-            source_start=0.0, source_end=1.0,
-            matched_video_id="v1", matched_video_name="v",
-            matched_start=0.0, matched_end=1.0,
+            source_start=0.0,
+            source_end=1.0,
+            matched_video_id="v1",
+            matched_video_name="v",
+            matched_start=0.0,
+            matched_end=1.0,
             similarity=100.0,
         )
         assert seg100.similarity == 100.0
 
     def test_create_unique_ids(self):
         seg1 = DuplicateSegment.create(
-            source_start=0.0, source_end=1.0,
-            matched_video_id="v1", matched_video_name="v",
-            matched_start=0.0, matched_end=1.0,
+            source_start=0.0,
+            source_end=1.0,
+            matched_video_id="v1",
+            matched_video_name="v",
+            matched_start=0.0,
+            matched_end=1.0,
             similarity=50.0,
         )
         seg2 = DuplicateSegment.create(
-            source_start=0.0, source_end=1.0,
-            matched_video_id="v1", matched_video_name="v",
-            matched_start=0.0, matched_end=1.0,
+            source_start=0.0,
+            source_end=1.0,
+            matched_video_id="v1",
+            matched_video_name="v",
+            matched_start=0.0,
+            matched_end=1.0,
             similarity=50.0,
         )
         assert seg1.id != seg2.id
@@ -213,20 +225,19 @@ class TestDuplicationRecordCreate:
 
 class TestDuplicationRecordStatus:
     def test_mark_processing(self):
-        record = DuplicationRecord.create(
-            user_id="u1", filename="t.mp4", file_size=100, storage_key="k1"
-        )
+        record = DuplicationRecord.create(user_id="u1", filename="t.mp4", file_size=100, storage_key="k1")
         record.mark_processing()
         assert record.status == "processing"
 
     def test_mark_completed(self):
-        record = DuplicationRecord.create(
-            user_id="u1", filename="t.mp4", file_size=100, storage_key="k1"
-        )
+        record = DuplicationRecord.create(user_id="u1", filename="t.mp4", file_size=100, storage_key="k1")
         seg = DuplicateSegment.create(
-            source_start=0.0, source_end=5.0,
-            matched_video_id="v1", matched_video_name="v",
-            matched_start=0.0, matched_end=5.0,
+            source_start=0.0,
+            source_end=5.0,
+            matched_video_id="v1",
+            matched_video_name="v",
+            matched_start=0.0,
+            matched_end=5.0,
             similarity=90.0,
         )
         record.mark_completed(duplicate_rate=25.5, duplicate_count=3, segments=[seg])
@@ -236,26 +247,20 @@ class TestDuplicationRecordStatus:
         assert len(record.segments) == 1
 
     def test_mark_completed_invalid_rate_raises(self):
-        record = DuplicationRecord.create(
-            user_id="u1", filename="t.mp4", file_size=100, storage_key="k1"
-        )
+        record = DuplicationRecord.create(user_id="u1", filename="t.mp4", file_size=100, storage_key="k1")
         with pytest.raises(ValueError, match="duplicate_rate must be between 0 and 100"):
             record.mark_completed(duplicate_rate=-1, duplicate_count=0, segments=[])
         with pytest.raises(ValueError, match="duplicate_rate must be between 0 and 100"):
             record.mark_completed(duplicate_rate=101, duplicate_count=0, segments=[])
 
     def test_mark_failed(self):
-        record = DuplicationRecord.create(
-            user_id="u1", filename="t.mp4", file_size=100, storage_key="k1"
-        )
+        record = DuplicationRecord.create(user_id="u1", filename="t.mp4", file_size=100, storage_key="k1")
         record.mark_failed("网络超时")
         assert record.status == "failed"
         assert record.error_message == "网络超时"
 
     def test_can_retry_only_failed(self):
-        record = DuplicationRecord.create(
-            user_id="u1", filename="t.mp4", file_size=100, storage_key="k1"
-        )
+        record = DuplicationRecord.create(user_id="u1", filename="t.mp4", file_size=100, storage_key="k1")
         assert record.can_retry() is False  # pending
 
         record.mark_processing()
@@ -265,25 +270,27 @@ class TestDuplicationRecordStatus:
         assert record.can_retry() is True  # failed
 
         seg = DuplicateSegment.create(
-            source_start=0.0, source_end=1.0,
-            matched_video_id="v1", matched_video_name="v",
-            matched_start=0.0, matched_end=1.0,
+            source_start=0.0,
+            source_end=1.0,
+            matched_video_id="v1",
+            matched_video_name="v",
+            matched_start=0.0,
+            matched_end=1.0,
             similarity=50.0,
         )
-        record2 = DuplicationRecord.create(
-            user_id="u1", filename="t.mp4", file_size=100, storage_key="k1"
-        )
+        record2 = DuplicationRecord.create(user_id="u1", filename="t.mp4", file_size=100, storage_key="k1")
         record2.mark_completed(10.0, 1, [seg])
         assert record2.can_retry() is False  # completed
 
     def test_reset_for_retry(self):
-        record = DuplicationRecord.create(
-            user_id="u1", filename="t.mp4", file_size=100, storage_key="k1"
-        )
+        record = DuplicationRecord.create(user_id="u1", filename="t.mp4", file_size=100, storage_key="k1")
         seg = DuplicateSegment.create(
-            source_start=0.0, source_end=1.0,
-            matched_video_id="v1", matched_video_name="v",
-            matched_start=0.0, matched_end=1.0,
+            source_start=0.0,
+            source_end=1.0,
+            matched_video_id="v1",
+            matched_video_name="v",
+            matched_start=0.0,
+            matched_end=1.0,
             similarity=50.0,
         )
         record.mark_completed(50.0, 2, [seg])
diff --git a/tests/unit/test_edit_plan_clip.py b/tests/unit/test_edit_plan_clip.py
index 81e683e0c..f118b5437 100755
--- a/tests/unit/test_edit_plan_clip.py
+++ b/tests/unit/test_edit_plan_clip.py
@@ -140,15 +140,11 @@ class TestEditPlanClipStateTransitions:
 
 class TestEditPlanClipProperties:
     def test_end_time(self):
-        clip = EditPlanClip.create(
-            plan_id="p1", clip_type="v", order=1, start_time=10.0, duration=5.0
-        )
+        clip = EditPlanClip.create(plan_id="p1", clip_type="v", order=1, start_time=10.0, duration=5.0)
         assert clip.end_time == 15.0
 
     def test_end_time_zero_duration(self):
-        clip = EditPlanClip.create(
-            plan_id="p1", clip_type="v", order=1, start_time=5.0, duration=0.0
-        )
+        clip = EditPlanClip.create(plan_id="p1", clip_type="v", order=1, start_time=5.0, duration=0.0)
         assert clip.end_time == 5.0
 
     def test_has_asset_true(self):
diff --git a/tests/unit/test_subtitle.py b/tests/unit/test_subtitle.py
index 2da0940ba..c8bac484a 100755
--- a/tests/unit/test_subtitle.py
+++ b/tests/unit/test_subtitle.py
@@ -2,7 +2,7 @@
 
 import pytest
 
-from packages.domain.subtitle import SubtitleWord, SubtitleSegment, SubtitleTimeline
+from packages.domain.subtitle import SubtitleSegment, SubtitleTimeline, SubtitleWord
 
 
 class TestSubtitleWord:
@@ -46,26 +46,32 @@ class TestSubtitleTimeline:
         assert tl.total_duration == 0.0
 
     def test_segment_count(self):
-        tl = SubtitleTimeline(segments=[
-            SubtitleSegment(text="第一段", start=0.0, end=2.0),
-            SubtitleSegment(text="第二段", start=2.0, end=5.0),
-        ])
+        tl = SubtitleTimeline(
+            segments=[
+                SubtitleSegment(text="第一段", start=0.0, end=2.0),
+                SubtitleSegment(text="第二段", start=2.0, end=5.0),
+            ]
+        )
         assert tl.segment_count == 2
         assert tl.total_chars == 6
 
     def test_total_chars(self):
-        tl = SubtitleTimeline(segments=[
-            SubtitleSegment(text="abc", start=0, end=1),
-            SubtitleSegment(text="defg", start=1, end=2),
-        ])
+        tl = SubtitleTimeline(
+            segments=[
+                SubtitleSegment(text="abc", start=0, end=1),
+                SubtitleSegment(text="defg", start=1, end=2),
+            ]
+        )
         assert tl.total_chars == 7
 
 
 class TestMergeShortSegments:
     def test_single_segment_no_change(self):
-        tl = SubtitleTimeline(segments=[
-            SubtitleSegment(text="你好", start=0.0, end=1.0),
-        ])
+        tl = SubtitleTimeline(
+            segments=[
+                SubtitleSegment(text="你好", start=0.0, end=1.0),
+            ]
+        )
         result = tl.merge_short_segments(min_chars=8)
         assert result.segment_count == 1
         assert result.segments[0].text == "你好"
@@ -76,12 +82,14 @@ class TestMergeShortSegments:
         assert result.segment_count == 0
 
     def test_merge_short_segments(self):
-        tl = SubtitleTimeline(segments=[
-            SubtitleSegment(text="你好", start=0.0, end=1.0),
-            SubtitleSegment(text="今天", start=1.0, end=2.0),
-            SubtitleSegment(text="天气", start=2.0, end=3.0),
-            SubtitleSegment(text="真好", start=3.0, end=4.0),
-        ])
+        tl = SubtitleTimeline(
+            segments=[
+                SubtitleSegment(text="你好", start=0.0, end=1.0),
+                SubtitleSegment(text="今天", start=1.0, end=2.0),
+                SubtitleSegment(text="天气", start=2.0, end=3.0),
+                SubtitleSegment(text="真好", start=3.0, end=4.0),
+            ]
+        )
         result = tl.merge_short_segments(min_chars=4)
         # 每段2字，min=4，应该每2段合并
         assert result.segment_count == 2
@@ -94,26 +102,40 @@ class TestMergeShortSegments:
 
     def test_remaining_merged_to_last(self):
         # 3段，每段2字，min=5 → 前5字合并，剩余1字并到最后
-        tl = SubtitleTimeline(segments=[
-            SubtitleSegment(text="一二", start=0, end=1),
-            SubtitleSegment(text="三四", start=1, end=2),
-            SubtitleSegment(text="五", start=2, end=3),
-        ])
+        tl = SubtitleTimeline(
+            segments=[
+                SubtitleSegment(text="一二", start=0, end=1),
+                SubtitleSegment(text="三四", start=1, end=2),
+                SubtitleSegment(text="五", start=2, end=3),
+            ]
+        )
         result = tl.merge_short_segments(min_chars=5)
         assert result.segment_count == 1
         assert result.segments[0].text == "一二三四五"
 
     def test_merge_with_words(self):
-        tl = SubtitleTimeline(segments=[
-            SubtitleSegment(text="你好", start=0.0, end=1.0, words=[
-                SubtitleWord(text="你", start=0.0, end=0.5),
-                SubtitleWord(text="好", start=0.5, end=1.0),
-            ]),
-            SubtitleSegment(text="世界", start=1.0, end=2.0, words=[
-                SubtitleWord(text="世", start=1.0, end=1.5),
-                SubtitleWord(text="界", start=1.5, end=2.0),
-            ]),
-        ])
+        tl = SubtitleTimeline(
+            segments=[
+                SubtitleSegment(
+                    text="你好",
+                    start=0.0,
+                    end=1.0,
+                    words=[
+                        SubtitleWord(text="你", start=0.0, end=0.5),
+                        SubtitleWord(text="好", start=0.5, end=1.0),
+                    ],
+                ),
+                SubtitleSegment(
+                    text="世界",
+                    start=1.0,
+                    end=2.0,
+                    words=[
+                        SubtitleWord(text="世", start=1.0, end=1.5),
+                        SubtitleWord(text="界", start=1.5, end=2.0),
+                    ],
+                ),
+            ]
+        )
         result = tl.merge_short_segments(min_chars=10)
         assert result.segment_count == 1
         assert len(result.segments[0].words) == 4
@@ -121,26 +143,32 @@ class TestMergeShortSegments:
 
 class TestSplitLongSegments:
     def test_short_segments_no_split(self):
-        tl = SubtitleTimeline(segments=[
-            SubtitleSegment(text="短文本", start=0.0, end=1.0),
-        ])
+        tl = SubtitleTimeline(
+            segments=[
+                SubtitleSegment(text="短文本", start=0.0, end=1.0),
+            ]
+        )
         result = tl.split_long_segments(max_chars=20)
         assert result.segment_count == 1
 
     def test_split_by_punctuation(self):
         text = "今天天气真好。我们出去玩吧！"
-        tl = SubtitleTimeline(segments=[
-            SubtitleSegment(text=text, start=0.0, end=5.0),
-        ])
+        tl = SubtitleTimeline(
+            segments=[
+                SubtitleSegment(text=text, start=0.0, end=5.0),
+            ]
+        )
         result = tl.split_long_segments(max_chars=10)
         assert result.segment_count >= 2
         # 合并起来应该等于原文
         assert "".join(s.text for s in result.segments) == text
 
     def test_split_preserves_time_order(self):
-        tl = SubtitleTimeline(segments=[
-            SubtitleSegment(text="一二三四五六七八九十。十一二三四五六七八九十。", start=0.0, end=10.0),
-        ])
+        tl = SubtitleTimeline(
+            segments=[
+                SubtitleSegment(text="一二三四五六七八九十。十一二三四五六七八九十。", start=0.0, end=10.0),
+            ]
+        )
         result = tl.split_long_segments(max_chars=10)
         # 时间应该是递增的
         for i in range(len(result.segments) - 1):
diff --git a/tests/unit/test_tts_config.py b/tests/unit/test_tts_config.py
index 962531ac8..3586d2080 100755
--- a/tests/unit/test_tts_config.py
+++ b/tests/unit/test_tts_config.py
@@ -40,16 +40,18 @@ class TestTtsConfigParse:
         assert config.speed == 1.0
 
     def test_parse_enabled_true_with_all_fields(self):
-        config = TtsConfig.parse({
-            "enabled": True,
-            "voice_id": "female_warm",
-            "speed": 1.5,
-            "pitch": 2.0,
-            "volume": 0.9,
-            "text": "你好世界",
-            "align_mode": "subtitle",
-            "overlap_mode": "mix",
-        })
+        config = TtsConfig.parse(
+            {
+                "enabled": True,
+                "voice_id": "female_warm",
+                "speed": 1.5,
+                "pitch": 2.0,
+                "volume": 0.9,
+                "text": "你好世界",
+                "align_mode": "subtitle",
+                "overlap_mode": "mix",
+            }
+        )
         assert config.enabled is True
         assert config.voice_id == "female_warm"
         assert config.speed == 1.5
diff --git a/tests/unit/test_verification_code.py b/tests/unit/test_verification_code.py
index ec897e05f..73a6c8a70 100755
--- a/tests/unit/test_verification_code.py
+++ b/tests/unit/test_verification_code.py
@@ -64,6 +64,7 @@ class TestVerificationCodeStatus:
         code = VerificationCode.create(recipient="test@example.com", code_type="email_bind", ttl_seconds=0)
         # 0秒TTL，立即可能过期（有极小概率因时间差没过）
         import time
+
         time.sleep(0.01)
         assert code.is_expired is True
         assert code.is_valid is False